Powder gun and plunger device adapted therefor



W. H. RO SE Feb. 23, 1937.

POWDER GUN AND PLUNGER DEVICE ADAPTED THEREFOR Filed March 8, 1955 2 Sheets-Sheet l INVENTOR.

ill ATTORNEY.

W. H. ROSE Feb. 23, 1937.

POWDER GUN AND PLUNGER DEVICE ADAPTED THEREFOR Filed March 8, 1955 2 Sheets-Sheet 2 INVENTOR.

ATTORNEY.

Patented Feb. 23, 1937 UNITED STATES POWDER GUN AND PLUNGER DEVICE ADAPTED THEREFOR William H. Rose, Jersey City, N. J., assignor to Stanco Incorporated, a corporation of Delaware Application March 8, 1935, Serial No. 10,042

1 Claim.

My invention relates to powder guns, or powder sprayers, and refers particularly to the plunger, or air-pressure, elements of such devices.

In devices adapted for the spraying of dusts and powders intended for use as insecticides and for other purposes, it is essential that the device be of such mechanical construction that a recipro eating movement of the plunger element, will cause the dust, or powder, within the device to be emitted in the form of a spray.

To accomplish this it is necessary that air be forced under pressure into that portion of the device containing the powder under such conditions that a mixture of powder and air will be expelled under pressure from the device.

This is usually accomplished by a reciprocating movement of the plunger element under conditions which will allow of the entrance of air between the plunger and the powder during one movement and will prevent the admission of air during the opposite movement, thus forcing the air into the powder chamber and thence a mixture of powder and air outwardly from the device.

One of the objects of my invention is a plunger device for the purposes mentioned in which there is a minimum of parts, thus making its construction inexpensive which is a most important feature as powder guns are employed with inexpensive powders.

Another object of my invention is a device in which the valve admitting and preventing the ingross of air is simple and effective, thus overcoming the dangers of disarrangement of parts during use which usually renders the device inoperative and useless.

Another object of my device is a plunger device capable of employment with powder guns of different constructions and which is equally effective with guns in which the loose powder is posi- 40 tioned within the gun and with those guns in which a powder-container, or powder-cartridge, is inserted within the gun.

The above mentioned, and other advantages of the device of my invention will be evident upon a consideration of my specification and its accompanying drawings in which similar parts are designated by similar numerals.

Figure 1 of the accompanying drawings is a Figure 4 is a right end view of the device of Figure 1 partially broken away.

Figure 5 is a face view of the valve member of the device shown in Figure 1.

Figure 6 is a face view of a modified form of my valve member.

Figure 7 is a face view of a modified form of my valve member.

Figure 8 is a face view of a modified form of the outer end member of my device employed with the valve member of Figure 6.

Figure 9 is a face view of a modified form of the outer end member of my device employed with the valve member of Figure '7 Figure 10 is a broken vertical cross-section of a modified form of the valve end of my device.

The particular form of the plunger of my invention for powder guns Figures 1, 2, and 5 shown in the accompanying drawings comprises a tubular casing ID. of the casing H3 consists of the annular member I! having the opening l2 and the flange l3, the latter being positioned to abut upon the outer face of the casing and preferably attached thereto by means of glue or other suitable attaching means.

Positioned within the closure member is an annular valve member I 4, the outer end portion of which is fixedly attached to the inner face of the closure member II. is formed in the valve member I 4 by cutting out a portion thereof, said opening extending partially, but not completely around the closure member and having a portion it which acts as a hinge for the valve member l4 within the opening I5. I prefer to make the valve member I4 of rather thick paper, but it may be of rubber or other suitable material which will have sufiicient resiliency to open and close the opening l2 during the operation of the device, and by resilient valv I include all such materials.

Without limiting myself to any particular form of powder container, as my plunger can be employed with powder containers of various mechanical constructions, I describe one form of a powder container simply to clearly explain the operation of my plunger device as shown in Figures 1, 3, and 4, which consists of a tubular member H, the outer end of which carries a dust-distributing member consisting of the annular member l8 having a plurality of openings 19, I9 and the annular flange 20 the latter being glued, or otherwise affixed, to the inner face of the tubular member l'l. Covering the end of the tubular member I! and spaced from the dust-distributing A closure covering one end L An annular opening l5 member 8 is a delivery member consisting of the annular member 2| having the annular flange 22 which is glued, or otherwise afilxed to the outer face of the cylindrical casing H. The element 2| has a deeply scored central portion 23 for purposes described later.

The other end of the tubular member |1 carries an annular member 24 having an opening 25 and an annular flange 26, the latter being fixedly attached to the inner face of the tubular member 11, a member 21 made of felt or other material which allows of the passage of air under pressure therethrough but which is impervi- 0115 to the dust employed is, by means of an adhesive 26 or otherwise, fixedly attached to the face of the member 24 covering the opening 25.

The operation of the device of my invention is as follows:

The dust 28 having insecticidal, or other desired properties is placed within the tubular member l1 and this dust-containing tubular member is then placed within the open end of my tubular member ID as clearly shown in Figure 1, the inner face of the member ID fitting closely against the outer face of the member H but allowing of telescopic movement thereover and the scored portion 23 is removed forming an opening in the member 2 The device is then in the position shown in Figure 1. As my plunger device is moved toward the powder container, the air in the chamber 29 closes the valve |4, thus being forced through the air-pervious member 21 into the chamber 30 and thence with powder through the openings l9, l9 into the chamber 3| and thence with the powder through the opening in the member 2|.

When my plunger device is moved outwardly from the powder container, the valve l4 opens into the position l4 allowing air to enter the chamber 29, while the dust non-pervious member 21 prevents the dust from entering the chamber 29.

It will thus be seen that my plunger device may be effectively employed by its reciprocating movements to eject powder from within the powdercontainer.

In the modified form of my device shown in Figures 6 and 8, the valve member I4 has a slit 32 instead of the cut-out l5 and the closure I has a plurality of openings 34, 34.

In the modified form of my device shown in Figures '1 and 9, the valve member l4 has two cut-outs 35, 35 instead of the cut-out |5, thus forming two hinge members 36, 36 and the openings 31, 31 in the member I are positioned to be closed by said valve.

In the modified form of my device shown in Figure 10, the closure member 3 of Figure 1 is replaced by an annular metallic member 38, the outer flanged periphery of which is crimped to the outer face of the tubular member ID and has the opening 39, 39.

The operation of the described modified forms of my device operate similarly to that already described.

It will thus be seen that my invention presents a plunger device for powder guns which is simple and inexpensive in construction, with a minimum of parts, not liable to get out of order and which operates easily and effectively.

I do not limit myself to the particular size, shape, number, arrangement or material of the parts particularly shown and described as these are given simply as a means for clearly illustrating the device of my invention.

What I claim is:--

In a dust gun having a hollow air pressure member and an annular inwardly flanged cover for one end thereof, a. valvular closure for the opening in said cover comprising a disc of re silient material, having a pair of arcuate slots concentric with the disc and disposed adjacent the periphery thereof with opposite ends of each slot separated by a narrow portion of the disc and forming a pair of segmentary flaps and an annular peripheral portion within which the flaps are disposed, the disc itself being disposed within the cover so as to be engaged at its peripheral portion between the cover and the end of said hollow member.

WILLIAM H. ROSE. 

